The Center for Development Research (ZEF) is an international and interdisciplinary research institute of the University of Bonn, Germany. This book focuses on how various social actors influence the planning process for Se San River Basin's management in response to the effect of Vietnamese Yali-Falls dam on Cambodian local communities' livelihoods. The author examined why responses employed by dam development agencies produce a particular outcome. He attempted to demonstrate their strategies and cultural means in taking control over negotiation process to win the battle for expanding hydropower exploitation in the Se San River for maximum economic gain. The organizing responses by local communities and their distant supporters are constrained and resisted by politics, resources and strategies of dam promoting agencies.